Production characteristics of COD Pipe Production Line: 
 COD on behalf of corrugated cable protection tube (Corrugated Optic Duct), which is more than one cable from the internal tube and the outer tube to form a whole, the new COD and COD by traditional general-purpose PVC pipe to the process of reproduction has been made within the tube (3 to 5) the outer tube assembly method to create a new era in this field. 
 Inner tube and outer tube are made of high density polyethylene with HDPE, a high degree of flexibility, although most are equipped with the outer tube inner tube, still wrapped around the pipe in the well wrapped box. 
 Features: compression, COD product is a special spiral shape, which enhances the traditional PE straight tube in compression, the compression capacity of a traditional tube several times to improve the effectiveness and flexibility, earthquake, subsidence, etc. can guarantee safety. Chemical resistance, durability acid, strong alkali capacity, better water resistance, laying in the water and wetlands, can be resistant to corrosion, is a semi-permanent pipeline. Credibility. Because the material is not conductive, high insulation, is ideal for cable channels. In addition the appearance of thermal expansion and contraction rather than traditional catheter system, and because of, the appearance of raw materials, has always maintained the same ratio. 
 As the COD tube (500 m) coils in the pipe rack, they are able to reduce the considerable labor costs. The most important thing is, COD does not require insertion tube, as has been equipped with a variety of inner tube inside the outer tube. As the lighter gravity (0.95:1.43), COD fairly light, and traditional tube than for the construction and transportation is very convenient. As the thread processing, COD can be bent easily, bending force can reach 90 degrees, even more perspective, does not require any special tools to bend or straighten. At the construction site can bypass an obstacle. As a good single-tube design and low friction coefficient, there is no connection, no kink of the problem leads particularly convenient, but also to extend the distance between holes. Inner tube completely airtight, resistant to high pressure, using fiber gas Rafah. In the case of the same diameter of the tube may be more and more control, increased use of benefits. Most importantly, COD can import up to a diameter of 75 within the cable diameter, while the traditional tube can only import 50. Application 
 Range: cable, cable protection tubes.